Support arguments on generation functions

[lucasmdrs]

This PR add support to pass arguments to fake functions and remove incompatible functions that do not generate values from the generated file.

[lucasmdrs]

Solves #129

[codecov-commenter]

Codecov Report

Merging #130 (c052835) into master (4b6cca5) will increase coverage by 5.41%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #130      +/-   ##
==========================================
+ Coverage   41.54%   46.96%   +5.41%     
==========================================
  Files           8        8              
  Lines         284      313      +29     
==========================================
+ Hits          118      147      +29     
  Misses        159      159              
  Partials        7        7              

Impacted Files	Coverage Δ
pkg/anonymiser/anonymiser.go	81.42% <100.00%> (+13.13%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 4b6cca5...c052835. Read the comment docs.